oracular
(of an utterance, advice, etc.) hard to interpret; enigmaticDelphic
deliberately obscure or ambiguous(relating to the ancient Greek oracle at Delphi)esoteric
intended for or likely to be understood by only a small number of people with a specialized knowledge or interestrecherché
rare, exotic, or obscurearcane
understood by few; mysterious or secretrecondite
(of a subject or knowledge) little known; abstruseabstruse
difficult to understand; obscureobscure
not clearly expressed or easily understoodinscrutable
impossible to understand or interpretimpenetrable
impossible to understandincomprehensible
not able to be understood; not intelligibleequivocal
open to more than one interpretation; ambiguousambiguous
open to more than one interpretation; not having one obvious meaningnot clear or decidedgnomic
difficult to understand because enigmatic or ambiguous:paradoxical
seemingly absurd or self-contradictorylaissez-faire
the policy of leaving things to take their own course, without interfering